Coverage varies depending on the size of the tiles and the size of the gaps. If this grout is being used with tiles that are 20mm x 20mm x 4mm with a 2mm gap between tiles a 200g pack will grout an area of 1.6 square feet (0.15 square metres). Instructions Wearing rubber gloves, make a 'volcano' by pouring the grout onto a flat piece of scrap wood, paper plate or plastic bowl and make a well in the centre. Gradually add water to the well and mix thoroughly with a lollipop stick, glue spreader or something similar. The mixed grout should be of toothpaste consistency - if it is too stiff it will not go into the gaps, if it is too wet it will wash out. Using a grout spreader or a plastic card, apply grout to the surface of your tiles running the grout spreader in all directions to fill all the gaps. Remove excess grout with the grout spreader as best you can. Leave for 10-15 minutes until you can see the grout is beginning to dry then rub the surface with colour free newspaper or grouting sponge until it is free from excess grout. If needed the tiles can be cleaned later with a mixture of vinegar and water and any stubborn marks can be removed with an abrasive grout cleaning pad.